CN105730153B - Pneumatic tire and its shaping mould - Google Patents
Pneumatic tire and its shaping mould Download PDFInfo
- Publication number
- CN105730153B CN105730153B CN201510995839.8A CN201510995839A CN105730153B CN 105730153 B CN105730153 B CN 105730153B CN 201510995839 A CN201510995839 A CN 201510995839A CN 105730153 B CN105730153 B CN 105730153B
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- Prior art keywords
- siping
- pneumatic tire
- pair
- plate
- wall surface
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
- B29D30/68—Cutting profiles into the treads of tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C11/1218—Three-dimensional shape with regard to depth and extending direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1259—Depth of the sipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0613—Means, e.g. sipes or blade-like elements, for forming narrow recesses in the tyres, e.g. cuts or incisions for winter tyres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0072—Roughness, e.g. anti-slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C2011/0334—Stiffness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe
- B60C2011/1209—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape of the sipe straight at the tread surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
- B60C2011/1254—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern with closed sipe, i.e. not extending to a groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
- B60C2011/1277—Width of the sipe being narrow, i.e. less than 0.3 mm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/133—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising recesses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
- B60C2011/1338—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls comprising protrusions
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
It is an object of the present invention to which ground contacting part is inhibited to deform while siping is arranged in ground connection.In the ground contacting part (16) for the tyre surface for being set to pneumatic tire, siping (18) are set.Siping (18) includes that width is 0.6mm narrow width part below (20), and a pair of of wall surface (22) facing each other of narrow width part (20), the arithmetic average roughness Ra of (24) are 1.6 μm or less.The shaping mould (50) of pneumatic tire has for making the molding siping plate (52) of siping, siping plate (52) includes with a thickness of 0.6mm thin plate part below (54), and a pair of of side (56) of thin plate part (54), the arithmetic average roughness Ra of (58) are 1.8 μm or less.
Description
Technical field
The present invention relates to a kind of pneumatic tire and its shaping moulds.
Background technique
In the past, it such as in winter tire, is provided with and is claimed in the ground contacting part of such as pattern block or ribs etc.
The notch for making siping, by the edge effect as caused by siping, so that can be in the lower ice snow covered pavement of coefficient of friction
It is steadily travelled on face.The siping have the effect of it is above-mentioned, on the contrary, as shown in figure 9, siping 101 connects ground
The rigidity of contact portion 102 reduces, so that the deformation of ground contacting part 102 (shrivels) degree and becomes larger in ground connection.Exist instead as a result,
The case where edge effect is damaged or resistance to partial wear reduces.Therefore, it in order to inhibit ground contacting part to deform, proposes in depth
The so-called 3-dimensional sipe of the shape of siping is changed on degree direction.But 3-dimensional sipe is demoulded in tire
When (that is, when dismantling from shaping mould by cured molding tire), resistance when siping plate is dismantled from tread-rubber surface
It is larger, the main reason for becoming starved.
The flat 8-175115 bulletin of Japanese Laid-Open discloses the following contents, by the facing each other of siping
A pair of of wall surface 20-300 μm of bumps are set, the frictional resistance between a pair of of wall surface is thus improved, to inhibit ground face contact
The deformation in portion.In addition, Japan spy table 2005-505456 bulletin (WO2003/033281) is disclosed directly below content, by
Ribs referred to as embossment (relief) are arranged to inclined trellis by the wall surface of siping, and make entire wall surface shape
The mean roughness of 1/100-1/10 as siping width, and, it combines in these macroscopic aspects (macro level)
Roughness and microcosmic point (micro level) on roughness, so as to improve the locking effect between a pair of of wall surface.
But in the method for making the wall roughness of siping roughening in this way, ground contacting part deformation inhibitory effect may not fill
Point.
In addition, the flat 8-258515 bulletin of Japanese Laid-Open is disclosed directly below content, when tire demoulds, in order to inhibit by inciting somebody to action
Siping plate pattern block caused by being close between the wall surface for making siping when the molding of tread-rubber surface shrivels,
In the wall surface of siping, 50-200 μm of bumps are set.But identically as the flat 8-175115 bulletin of Japanese Laid-Open,
Due to being the method for keeping the wall surface of siping roughening, the effect for inhibiting ground contacting part to deform when tire is grounded is not
Sufficiently.
On the other hand, the flat 11-42913 bulletin of Japanese Laid-Open is disclosed directly below content, in order to improve braking on ice
Can, the width of siping is set as to be thinner than the 0.1-0.3mm of general width, and for reinforcement siping plate, setting
In the cylindrical space that sipe depth side upwardly extends.But the content for making the wall surface mirror-polishing of siping is not disclosed.
Summary of the invention
Subject to be solved by the invention
In the past, the width of general siping was 0.6-1.5mm or so, more wide cut.In addition, in general, taking turns
In tire shaping mould, it will be used to that the molding siping plate of siping to be made to install to die surface, in order to make die surface
It is whole smooth and blasting treatment can be implemented.Even if assuming that installation to the siping plate surface before die surface is mirror surface,
Siping plate is also because blasting treatment is inevitably roughened to a certain extent.Therefore, it is formed by previous siping plate
Even if the wall surface of siping seem and be flat, it may have the roughness that arithmetic average roughness Ra is 2.5 μm or more.
In the siping of such more wide cut and the wall surface with surface roughness, ground contacting part can not be inhibited to connect in tire
It is deformed when ground.
The present embodiment be proposed in view of problem above, it is intended that provide it is a kind of setting siping it is same
When be able to suppress ground contacting part pneumatic tire and its shaping mould for deforming in ground connection.
The method to solve the problem
The inventors found that a kind of following method for solving the above subject is as inhibiting ground contacting part taking turns
The method that tire deforms when being grounded, that is, with the above-mentioned previous method for making it have hook in siping wall surface setting bumps
It is entirely different, by improving the flatness of siping wall surface, so as to solve the above subject.
The pneumatic tire of first embodiment has the ground contacting part for being set to tyre surface and is set to the ground
The siping of contact portion, the siping include that width is 0.6mm narrow width part below, and the narrow width part is practised physiognomy each other
Pair a pair of of wall surface arithmetic average roughness Ra be 1.6 μm or less.
The pneumatic tire of second embodiment has the ground contacting part for being set to tyre surface and is set to the ground
The siping of contact portion, the siping have a pair of of wall surface facing each other, and the pair of wall surface, which has, passes through water
The surface smoothness and interval that film can be such that wall surface adsorbs each other, the moisture film is by immersing between wall surface facing each other
Water formed.
The shaping mould of the pneumatic tire of third embodiment, has for making siping be molded over ground contacting part
Siping plate, the ground contacting part are formed in tyre surface, and the siping plate includes with a thickness of 0.6mm thin plate below
Portion, the arithmetic average roughness Ra of a pair of of side of the thin plate part is 1.8 μm hereinafter, the pair of side is for making the knife
A pair of of wall surface molding facing each other of slot decorative pattern.
The effect of invention
According to the present embodiment, when contacting with road surfaces containing water such as ice and snow roads, water is sucked into siping, thus
Make wall surface be easy absorption each other to be even close to, therefore is able to suppress ground contacting part and deforms in ground connection.
Detailed description of the invention
Fig. 1 is the expanded view for showing the tread contour of pneumatic tire of embodiment 1.
Fig. 2 is the pattern block of embodiment 1 and the top view that part thereof of enlarged drawing is shown together.
Fig. 3 (A) is along the cross-sectional view of the IIIa-IIIa line of Fig. 2, and Fig. 3 (B) is the IIIb-IIIb line along Fig. 2
Cross-sectional view.
Fig. 4 is major part amplification stereogram that show the siping plate of embodiment 1, tire building mould.
Fig. 5 is the enlarged cross-sectional view for showing state of the pattern block in tire ground connection in embodiment 1.
Fig. 6 is the pattern block of embodiment 2 and the top view that part thereof of enlarged drawing is shown together.
Fig. 7 (A) is along the cross-sectional view of the VIIa-VIIa line of Fig. 6, and Fig. 7 (B) is the VIIb-VIIb line along Fig. 6
Cross-sectional view.
Fig. 8 is the major part amplification stereogram for showing the tire building mould of siping plate of embodiment 2.
Fig. 9 is the cross-sectional view for showing state of the previous pattern block in tire ground connection.
Figure 10 is the schematic diagram of the difference in height abrasion loss in the evaluation for indicate resistance to partial wear.
Description of symbols
10 ... fetus faces, 16 ... pattern blocks, 18,18A ... siping, 20 ... narrow width parts, 22,24 ... wall surfaces, 30 ... is recessed
Slot, 50 ... tire building moulds, 52 ... siping plates, 54 ... thin plate parts, 56,58 ... sides, 62 ... raised lines, W ... siping
Width, the thickness of T ... siping, F ... moisture film
Specific embodiment
Hereinafter, being illustrated based on attached drawing to embodiment of the present invention.
[embodiment 1]
Though the illustration is omitted for the pneumatic tire in embodiment, have circle portion and sidewall and the tire of pair of right and left tire
Face 10 and constitute, the mode between radially outer end of the fetus face 10 to link left and right sidewall is arranged in two
Between sidewall, general tire construction can be used other than tread contour.
As shown in Figure 1, being provided with a plurality of main line (circle extended on tire circumferential direction on the surface of fetus face 10
Circumferential direction groove) 12；With a plurality of traverse furrow slot (width extended on the direction (tire width direction) reported to the leadship after accomplishing a task with the main line 12
Direction groove) 14.By these main lines 12 and traverse furrow slot 14, the pattern block being formed with as multiple ground contacting parts is divided
16.Pattern block 16 is provided with siping 18, which upwardly extends with the side that tire circumferential direction is reported to the leadship after accomplishing a task.Just
For siping 18, in an example, both ends are not in the notch of block edge opening (that is, not opening in main line 12
Mouthful, and the notch terminated in pattern block 16, also referred to as contained sipe (closure siping (closesipe))).This
Outside, the reference number C L in figure indicates tire equator.
As shown in enlarged drawing 2, siping 18 is the linear siping extended parallel to tire width direction,
One is respectively set in each pattern block 16.In addition, siping 18 is on the D of sipe depth direction as shown in Fig. 3 (B)
The cross sectional shape of width direction be, in radially extending linear of tire.Siping 18 is in sipe length direction L
And fixed width W is formed on the D of sipe depth direction.In addition, in each pattern block 16, it can be on tire circumferential direction
It is provided spaced apart a plurality of siping 18.In addition, siping 18 is also possible to tilt and prolong relative to tire width direction
The siping stretched.In addition, being not limited to linear siping when vertical view as shown in Figure 2, being also possible to overlook in wave shape
(that is, having wave shed portion) siping.
In the present embodiment, it is 0.6mm narrow width part 20 below that siping 18, which includes width W, the narrow width part 20
The arithmetic average roughness Ra of facing a pair of of wall surface 22,24 is set as 1.6 μm or less each other.That is, siping 18 has
The arithmetic average roughness Ra on surface be 1.6 μm or less and be spaced W be 0.6mm it is below, each other facing a pair of of wall surface 22,
24.In an example, entire siping 18 is formed as narrow width part 20, and therefore, entire siping 18 is set as follows:
Width W is 0.6mm hereinafter, and the arithmetic average roughness Ra of facing each other a pair of of wall surface 22,24 is 1.6 μm or less.
Width (that is, interval of a pair of of wall surface 22,24) W of siping 18 (narrow width part 20) is preferably 0.4mm hereinafter, more
Preferably 0.3mm or less.The value of width W is smaller, and the adsorption effect as caused by the water being sucked into siping 18 becomes higher,
Therefore its lower limit is not particularly limited, such as can is 0.1mm or more.
As described above, the surface of facing two wall surfaces (groove wall surface) 22,24 of siping 18 (narrow width part 20)
Arithmetic average roughness Ra is 1.6 μm hereinafter, in smoothing even mirror-polishing compared with previous general siping wall surface.This
The arithmetic average roughness Ra of a little wall surfaces 22,24 is preferably 1.3 μm hereinafter, more preferably 1.0 μm or less.Arithmetic average roughness
The value of Ra is smaller, and flatness is higher, and the adsorption effect as caused by the water being sucked into siping 18 becomes higher, therefore to it
Lower limit is not particularly limited, such as can be 0.1 μm or more, or 0.5 μm or more.Herein, arithmetic average roughness Ra
It is to be defined according to JIS B0601:2013, is the base for only taking the direction of its average line from roughness curve specifically
Standard length, after being added up to the inclined absolute value of the difference since the average line of the taking-up part until measuring curve, being average
Numerical value.
Fig. 4 shows the major part for having the tire building mould (molding die) 50 of siping plate 52, the cutter groove flower
Card 52 is the metal plate for making above-mentioned siping 18 take shape in pattern block 16.In addition, the appended drawing reference 60 in Fig. 4 is illustrated
Property indicate, from make above-mentioned main line 12 and the molding ribs of traverse furrow slot 14 cut a part state.
Siping plate 52 includes that thickness T is 0.6mm thin plate part 54 below, a pair of of side 56,58 of thin plate part 54
Arithmetic average roughness Ra is set as 1.8 μm hereinafter, the pair of side 56,58 is used to make the facing each other of siping 18
A pair of of wall surface 22,24 form.In an example, entire siping plate 52 is formed by thin plate part 54, therefore, siping plate
52 entirety is formed as follows as tabular: thickness T is the arithmetic average of 0.6mm or less and positive and negative two sides 56,58
Roughness Ra is 1.8 μm or less.
In general, the surface of the wall surface 22,24 of the siping 18 transferred by the side 56,58 of siping plate 52
Roughness, less than the surface roughness of the side 56,58 of siping plate 52.Therefore, by by the side of siping plate 52
56,58 arithmetic average roughness Ra is set as 1.8 μm hereinafter, can be by the arithmetic average of the wall surface 22,24 of siping 18
Roughness Ra is set as 1.6 μm or less.The arithmetic average roughness Ra of the side 56,58 of siping plate 52 (thin plate part 54) is excellent
1.6 μm are selected as hereinafter, more preferably 1.3 μm or less.In addition, its lower limit for example can be 0.1 μm or more, it is also possible to 0.5 μm
More than.
The thickness T of siping plate 52 (thin plate part 54) is preferably 0.4mm identically as the width W of above-mentioned siping 18
Hereinafter, more preferably 0.3mm or less.In addition, its lower limit for example can be 0.1mm or more.
For tire building mould 50, in addition to siping plate 52, other structures can use general tire building mould
Structure.In the present embodiment, by multiple siping plate 52 be implanted in the die surface of tire building mould 50 with
The corresponding position of siping 18.By using the tire building mould 50 and according to usual method come to unvulcanized tire base into
Row sulfidization molding, so as to manufacture pneumatic tire as described above.At this point, in the manufacturing process of general tire building mould
In, siping plate is installed to die surface, blasting treatment can be implemented in order to make the whole smoothing of die surface, because
The surface of the side 56,58 of this siping plate 52 is directly roughened.Therefore, in the present embodiment, knife can also be made
The side 56,58 of slot diamond plate 52 carries out blasting treatment in the state of covering (masking), removes shielding plate after processing.Alternatively,
Blasting treatment can also be carried out in the state of not covering, and the side of siping plate 52 56,58 is ground later, thus
Obtain above-mentioned defined arithmetic average roughness Ra.
In pneumatic tire by the present embodiment achieved above, as shown in figure 5, when pattern block 16 and ice and snow road etc. contain
When thering is the road surface S of water to be grounded, make the wall surface 22,24 facing each other of siping 18 by sucking water in siping 18
It is close to.That is, for a pair of of wall surface 22,24 facing each other of siping 18, since the interval W of the rwo is relatively narrow and
Smooth surface is formed as not residual air, the state being close to via moisture film F without bumps.At this point, as shown in the figure may be used
To think: the absorption as caused by the difference between hydraulic pressure and atmospheric pressure can be obtained between wall surface 22,24 even by crimping
The effect of touching.The effect that wall surface 22,24 is close to each other can be obtained in this way, therefore can be improved the rigidity of pattern block 16,
Although being provided with siping 18 as a result, also it is able to suppress pattern block 16 and deforms in ground connection.Therefore, it can be improved resistance to
Partial wear, and edge effect can also be played, to improve performance on ice.
From this point of view, in the present embodiment, above-mentioned facing a pair of of wall surface each other of siping 18
22,24, a pair of wall surface 22,24 have by moisture film F can make wall surface 22,24 each other adsorb surface smoothness Ra and
It is formed every W, the moisture film F by immersing to the water between the wall surface 22,24, there is relatively narrow width compared with previous siping
Degree and higher flatness.Thereby, it is possible to play the effect for making wall surface 22,24 adsorb and be formed as one each other, thus
Improve the rigidity of pattern block 16.
In addition, according to the present embodiment, since siping plate 52 is feelings that are smooth, demoulding when manufacturing tire
Under condition, resistance when dismantling siping plate 52 from tread-rubber surface is smaller, so as to inhibit the defect of rubber.
[embodiment 2]
The structure of siping and siping plate based on Fig. 6-8 pairs of embodiments 2 is illustrated.Embodiment 2
Siping 18A is different from embodiment 1 at following aspect, that is, a pair of of wall facing each other in above-mentioned narrow width part 20
A groove 30 extended on the D of sipe depth direction is at least arranged at least side in face 22,24.
Specifically, in an example, groove 30 is only arranged at the wall surface 22 of side, in the wall surface 22 of the side, three
Groove 30 interval (herein at equal intervals) on the L of sipe length direction is arranged.Groove 30 is its width W1 (cutter groove
The size of groove 30 on decorative pattern length direction L) less than or equal to siping 18A width W fine groove (W1≤W), Fig. 6
Shown in when overlooking the cup depth K1 of groove 30 be set as the width W (K1≤W) less than or equal to siping 18A.Such as Fig. 7
(A) and shown in Fig. 7 (B), groove 30 is formed in the entirety of its depth direction D in siping 18A, from opening for siping 18A
Mouth face starts until bottom to be formed as linear.
Fig. 8 shows for making siping 18A take shape in the siping plate 52A of pattern block 16.In the siping plate
In 52A, in order to form above-mentioned groove 30, in a pair of of side of siping plate 52A (being specifically above-mentioned thin plate part 54)
56, a raised line 62 extended on the D of sipe depth direction is at least arranged in at least side in 58.It is convex in an example
Item 62 is only arranged at the side 56 of side, in the side 56 of the side, three raised lines 62 on the L of sipe length direction every
The standard width of a room in an old-style house every and be arranged.For the shape of raised line 62, in the same manner as the shape of above-mentioned groove 30, width is less than or equal to cutter groove
The thickness T of diamond plate 52A, and projecting height when section view is less than or equal to thickness T.In addition, raised line 62 is formed in cutter groove flower
The entirety of the short transverse of card 52A, the root of siping plate 52A start until top to be formed as linear.
For embodiment 2, flatness, the siping plate of width W and wall surface 22,24 including siping 18A
Other structures including the thickness T of 52A and the flatness of side 56,58 are identical as embodiment 1, and the description thereof will be omitted.
In embodiment 2, on the basis of the function and effect of the embodiment above 1, effect can be functioned as follows.
That is, groove 30 is arranged by the wall surface 22 in siping 18A, water can be promoted to be directed into siping 18A.So,
Groove 30 for introducing the water into siping 18A, by setting groove 30 come can in the early stage the stage make above-mentioned wall surface
22,24 are close to each other.
[other embodiments]
In the above-described embodiment, by the narrow and smoothing narrow of the abutting effect between performance wall surface 22,24
Width portion 20 is formed in the entirety of siping 18,18A, but is not necessarily meant to be formed in entirety.Siping 18,18A include narrow
It is 0.6mm or less including the broader part of width or width W but the part etc. that is not smoothed can also while width portion 20.
Preferably, siping 18,18A mainly include above-mentioned narrow width part 20, specifically, being equivalent to 50% or more of wall surface 22 (24)
The part of (more preferably 70% or more) is narrow width part 20.Siping plate 52, the thin plate part 54 of 52A are also phase in the above
With.
In the above-described embodiment, siping 18,18A are set as contained sipe, also applicable one end is in master
The open siping in the unilateral side that groove opening, the other end terminate in pattern block or both ends are opened in the two sides of tap drain channel opening
Cutter accommodating slot decorative pattern.
In the above-described embodiment, for the example that siping 18,18A are arranged in the pattern block 16 as ground contacting part
Son is illustrated, however as the ground contacting part for being provided with above-mentioned siping 18,18A, it is not limited to pattern block, it can also
To be the continuous ribs on tire circumferential direction.In addition, above-mentioned sipe configuration is applicable in tread contour
All ground contacting parts, the partially surface contact part that can also be only applicable in tread contour.For example, all in tread contour
Siping can have above-mentioned narrow width part, and a part of siping being also possible in all siping has narrow width part.
In short, at least one ground contacting part in tread contour, be at least arranged one include narrow width part siping.
Due to the significant effect that the inhibition ground contacting part of the present embodiment shrivels, it is preferably applied to have pattern block
The tire of the tread contour of keynote is preferably applied to such as winter tire (winter wheel due to that can improve performance on ice
Tire).The purposes of tire is not particularly limited, can be passenger car tire, is also possible to the heavy load for truck or bus
Use tire.
The width equidimension of siping is in the present embodiment, and tire is installed to standard rim and fills standard internal pressure
Size under non-loaded standard state afterwards.Standard rim refers to, in the schematism for including the specification based on tire, the rule
Lattice each tire defined wheel rim, if such as JATMA is then standard rim, if TRA be then " design wheel rim
(Design Rim) ", if ETRTO is then " measurement wheel rim (Measuring Rim) ".In addition, standard internal pressure refers to,
In the schematism, each specification each tire defined air pressure, if JATMA is then highest air pressure, if TRA is then
" the blowing pressure (the TIRE LOAD LIMITS AT VARIOUS COLD of tire load limit at different temperatures
INFLATION PRESSURES) " maximum value documented by table, if ETRTO is then " the blowing pressure (INFLATION
PRESSURE)”。
More than, several embodiments are illustrated, but these embodiments are only prompted as an example, and
It is not intended to limit the scope of the invention.These new embodiments can be implemented by various other ways, not depart from this
In the range of inventive concept, various omissions, substitutions and changes can be carried out.
[embodiment]
It is (big for the inflatable radial tyre for heavy load of pattern block pattern in order to confirm the effect of the embodiment above
It is small: 11R22.516P.R.), manufacture experimently each tire of embodiment and comparative example.The sipe configuration of each tire is for example following
Shown in table 1, in addition to the width of siping, the surface roughness of wall surface and other than having this several points of un-grooved, other tire constructions
It is all identical.Embodiment 1 is the example of the sipe configuration of the groove without embodiment 1 shown in Fig. 3 (A), is implemented
Example 2 and 3 is the example of the sipe configuration with the groove for being provided with embodiment 2 shown in Fig. 7 (A).Comparative example 1 and 2
The example of the sipe configuration without groove same as Example 1ly, the width of siping and/surface roughness with
Embodiment 1 is different.
In addition, the arithmetic average roughness Ra in table is to use (strain) Tokyo precision manufactureing according to JIS B0601:2013
Contact pin type surface roughness meter " E-35A " be measured.
Resistance to partial wear is had rated for each tire.The evaluation of resistance to partial wear proceeds as follows, that is, will
Tire is installed to after wheel rim (22.5 × 7.50), is filled to the internal pressure of 700kPa, and the large size for being 20 tons to gross vehicle load is installed
After the drive shaft of truck, in 80% loading condition downward driving defined distance (the about 7000km peace treaty of dead weight
25000km), and to front and back pattern block when travelling on the dry pavement and ice and snow road mated formation, on tire circumferential direction it
Between difference in height abrasion loss X (referring to Fig.1 0) be measured.For each operating range, the difference in height of comparative example 1 is ground
The value of damage amount is indicated as 100 index.The smaller resistance to partial wear of index is the better.
The results are shown in Table 1, for being provided with the comparative example 1 of wide cut and shaggy siping, narrow
Width and make in the embodiment 1-3 of surface smoothing, difference in height abrasion loss is smaller, and significant improves resistance to partial wear.
[table 1]
| Comparative example 1 | Comparative example 2 | Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Siping width W (mm) | 0.8 | 0.3 | 0.3 | 0.3 | 0.3 |
| Siping wall roughness Ra (μm) | 2.6 | 2.6 | 1.0 | 1.0 | 1.5 |
| There is un-grooved | Nothing | Nothing | Nothing | Have | Have |
| Siping plate surface roughness Ra (μm) | 3.0 | 3.0 | 1.3 | 1.3 | 1.8 |
| Difference in height abrasion loss when about traveling 7000km | 100 | 76 | 48 | 14 | 24 |
| Difference in height abrasion loss when about traveling 25000km | 100 | 75 | 66 | 22 | 31 |
Claims (9)
1. a kind of pneumatic tire has the ground contacting part for being set to tyre surface and is set to the cutter groove of the ground contacting part
Decorative pattern；
The siping includes that width is 0.4mm narrow width part below, a pair of of wall surface facing each other of the narrow width part
Smooth and arithmetic average roughness Ra be 1.6 μm or less.
2. pneumatic tire according to claim 1, has the ground contacting part for being set to tyre surface and be set to described
The siping of surface contact part；
The siping has a wall surface that facing a pair is smooth each other, the smooth wall surface of described a pair facing each other
With the surface smoothness and interval that wall surface can be made to adsorb each other by moisture film, the moisture film is by immersing to facing wall
Water between face is formed.
3. pneumatic tire according to claim 1, in which:
The entirety of the siping is formed by the narrow width part.
4. pneumatic tire according to any one of claim 1-3, in which:
At least side in a pair of of wall surface facing each other of the siping is at least arranged one in siping depth
The groove that degree side upwardly extends.
5. pneumatic tire according to claim 4, in which:
The width of the groove is less than or equal to the width of the siping, and the cup depth of the groove when looking down is less than
Or the width equal to the siping.
6. a kind of shaping mould of pneumatic tire has the siping plate for making siping be molded over ground contacting part,
The ground contacting part is formed in tyre surface；
The siping plate include with a thickness of 0.4mm thin plate part below, a pair of of side of the thin plate part be it is smooth and
Arithmetic average roughness Ra is 1.8 μm hereinafter, the pair of side makes a pair of of wall surface facing each other of the siping
Molding.
7. the shaping mould of pneumatic tire according to claim 6, in which:
The entirety of the siping plate is formed by the thin plate part.
8. the shaping mould of pneumatic tire according to claim 6 or 7, in which:
At least side in the pair of side of the siping plate is at least arranged one in sipe depth direction
The raised line of upper extension.
9. the shaping mould of pneumatic tire according to claim 8, in which:
The width of the raised line is less than or equal to the thickness of the siping plate, and projecting height of the raised line in section view is small
In or equal to the siping plate thickness.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-262724 | 2014-12-25 | ||
| JP2014262724A JP6472022B2 (en) | 2014-12-25 | 2014-12-25 | Pneumatic tire and its mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105730153A CN105730153A (en) | 2016-07-06 |
| CN105730153B true CN105730153B (en) | 2019-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510995839.8A Active CN105730153B (en) | 2014-12-25 | 2015-12-25 | Pneumatic tire and its shaping mould |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20160185161A1 (en) |
| JP (1) | JP6472022B2 (en) |
| CN (1) | CN105730153B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3076763A1 (en) * | 2018-01-18 | 2019-07-19 | Compagnie Generale Des Etablissements Michelin | METHOD FOR MANUFACTURING A MOLD SEGMENT FOR COOKING AND VULCANIZING A TIRE |
| JP6915649B2 (en) * | 2019-07-03 | 2021-08-04 | 横浜ゴム株式会社 | Tire vulcanization mold and tire manufacturing method |
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| JPH1142913A (en) * | 1997-07-30 | 1999-02-16 | Yokohama Rubber Co Ltd:The | Pneumatic tire and its molding metal mold |
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| JP3906967B2 (en) * | 2000-12-21 | 2007-04-18 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP3811045B2 (en) * | 2001-03-27 | 2006-08-16 | 日本碍子株式会社 | Sipe blade molding die and manufacturing method thereof |
| JP4487124B2 (en) * | 2004-06-21 | 2010-06-23 | 横浜ゴム株式会社 | Pneumatic tire and tire mold |
| JP4299745B2 (en) * | 2004-08-12 | 2009-07-22 | 住友ゴム工業株式会社 | Pneumatic tire |
| FR2898298B1 (en) * | 2006-03-08 | 2010-08-20 | Michelin Soc Tech | TIRE TREAD INCISION COMPRISING BLOCKING PARTS. |
| JP5168810B2 (en) * | 2006-04-07 | 2013-03-27 | 横浜ゴム株式会社 | A pneumatic tire and a mold for molding the pneumatic tire. |
| WO2008146890A1 (en) * | 2007-05-29 | 2008-12-04 | Bridgestone Corporation | Pneumatic tire |
| JP6068139B2 (en) * | 2010-03-26 | 2017-01-25 | 株式会社ブリヂストン | Tire and method for manufacturing tire vulcanizing mold |
| JP5606824B2 (en) * | 2010-08-18 | 2014-10-15 | 株式会社不二製作所 | Mold surface treatment method and mold surface-treated by the above method |
| CN102442166B (en) * | 2010-10-13 | 2015-07-01 | 东洋橡胶工业株式会社 | Pneumatic tire |
| JP5797452B2 (en) * | 2011-05-16 | 2015-10-21 | 東洋ゴム工業株式会社 | Sipe blade and tire manufacturing method |
| JP6000218B2 (en) * | 2013-10-09 | 2016-09-28 | 横浜ゴム株式会社 | Pneumatic tire |
-
2014
- 2014-12-25 JP JP2014262724A patent/JP6472022B2/en active Active
-
2015
- 2015-12-17 US US14/972,240 patent/US20160185161A1/en not_active Abandoned
- 2015-12-25 CN CN201510995839.8A patent/CN105730153B/en active Active
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| JPH10138714A (en) * | 1996-11-11 | 1998-05-26 | Bridgestone Corp | Pneumatic tire |
| JPH1142913A (en) * | 1997-07-30 | 1999-02-16 | Yokohama Rubber Co Ltd:The | Pneumatic tire and its molding metal mold |
| JP2004224213A (en) * | 2003-01-23 | 2004-08-12 | Yokohama Rubber Co Ltd:The | Pneumatic tire and its manufacturing method |
| CN101181865A (en) * | 2006-11-17 | 2008-05-21 | 东洋橡胶工业株式会社 | Pneumatic tire |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105730153A (en) | 2016-07-06 |
| US20160185161A1 (en) | 2016-06-30 |
| JP6472022B2 (en) | 2019-02-20 |
| JP2016120857A (en) | 2016-07-07 |
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